Method for setting a magnetic sound record sheet on a magnetic sound record reading machine and an apparatus therefor



June 14, 1960 YAsUsHl Hosl-nNo ETAL 2,940,763 METHOD FOR SETTING A MAGNETIC SOUND RECORD SHEET ON A MAGNETIC SOUND RECORD READING MACHINE AND AN APPARATUS THEREFOR 3 Sheets-Sheet l Filed Oct. 23, 1957 [Ill June 14, 1960 YAsUsl-n HosHlNo ErAL 2,940,763

METHOD FOR SETTING A MAGNETIC SOUND RECORD SHEET CN A MAGNETIC souNn RECORD READING MACHINE AND AN APPARATUS THEREFOR Filed oct. 2s. 1957 June 14, 1960 YAsUsi-n HQsHlNO ErAL 2,940,763

METHOD FOR SETTING A MAGNETIC SOUND RECORD SHEET ON A MAGNETIC SOUND RECORD READING MACHINE AND AN APPARATUS THEREFOR Filed Oct 23 1957 3 Sheets-Sheet 3 und mm .mmm I ayUnited States Patent iice 2,940,753 Patented .lune 14, 1960 METHOD FOR SE'I'IING A MAGNETIC SOUND RECORD SHEET ON A MAGNETIC SOUND REC- ORD READING MACHINE AND AN APPARA- TUS THEREFOR Yasushi Hoshino, 462 l-chome, Tamagawa-Gkusawacho,

Setagaya-liu;` Minoru Sato, 635 Ishikawacho Apt., Ishikawa-cho, Gta-ku; and Mamom Namikawa, 664 Kugahara-cho, Oia-ku, all of Tokyo, Japan Filed Oct. 23, 1957, Ser. No. 691,979 Claims priority, application Japan Oct. 23, 1956 Claims. (Cl. 274-4) This invention relates to apparatus for setting a magnetic sound record sheet on a magnetic sound record reading machine. A magnetic sound record sheet has relatively great width and is made of a carrier of mateiial such as paper, plastic or similar other materials and magnetic sound record lm coated on the carrier sheet. The magnetic sound record sheet as described above may shrink and elongate in both lateral and longitudinal directions according to the change of temperature and humidity. The sheet has generally setting holes and is placed in a predetermined position on a magnetic sound record readingr machine by the engagement of the holes of the sheet with setting pins provided on a panel of a magnetic sound record reading machine. lt is apparent that, if the setting pins of the panel of the reading machine are in xed positions, it is hardly possible to set a magnetic sound record sheet on the panel when the sheet shrinks, and the sheet is placed in slack condition on the panel when it is elongated.

An object of this invention is to provide a method and an apparatus by which a magnetic sound record sheet can be placed on a panel always in stretched condition irrespective whether the sheet is shrunk or elongated.

Another object of this invention is to provide a system in which a magnetic sound record sheet can be conveniently set on a panel of the reading machine, distiibuting the shrinkage or elongation of the sheet in such a way that no practical diiculty will be caused in recording and reproducing of sound.

Another object of this invention is to provide setting holes in a magnetic sound record sheet which are suitable for distributing the shrinkage and the elongation of the sheet and setting the sheet in a proper position 'on the magnetic sound record reading machine.

The features and objects as described above as well as other features and objects of this invention will be made clear in the following description with reference to some embodiments of this invention illustrated by accompanying drawings, in which:

Fig. '1 is a perspective view of a magnetic sound record sheet which has been elongated under the inuence of change of temperature and humidity and set on a panel provided with fixed setting pins;

Fig. 2 is a diagrammatic front view of a panel provided with adjustable setting pins of a magnetic sound record reading machine according to this invention, in which a magnetic sound record sheet and a turntable of the reading machine are shown by chain lines;

Fig. 3 is a perspective view of a magnetic sound record sheet adapted to distribute the shrinkage and elongation of the sheet in such a way as does not cause practical diiculties in recording and reproduction;

Fig. 4 is a front view of a panel of a magnetic sound record reading machine adapted to set the magnetic sound record sheet as illustrated in Fig. 3;

Figs. 5 (a) and (b) are partial front views showing the condition of the engagement between a setting pin of a magnetic sound record reading machine and a setting hole of a magnetic sound record sheet;

Fig. 6 is a front view of a magnetic sound record sheet having four setting holes and placed on a panel of a magnetic sound record reading machine as illustrated in Fig. 2, showing the effect of elongation of a magnetic sound record sheet in the direction of width;

Fig. 7 illustrates a magnetic sound record sheet having two setting holes as illustrated in Fig. 3 and placed on a panel of a magnetic sound record reading machine as illustrated in Fig. 4, showing the distribution of elongation of width on both sides;

Figs. 8, 9 and 10 are devices-for changing the position of a setting pin of a magnetic sound record reading machine;

Fig. l1 is a perspective View of an apparatus for setting a magnetic sound record sheet having 4 setting holes on a magnetic sound record reading machine according to the system diagrammatically illustrated in Fig. 2;

Fig. l2 is a partial detailed perspective view of Fig. 11 in a larger scale showing a device for locking a setting pin and a device for disengaging a magnetic sound record sheet from a setting pin;

Fig. 13 is a perspective view of an apparatus for setting a magnetic sound record sheet having two setting holes on a magnetic sound record reading machine according to the system diagrammatically illustrated in Fig. 3;

Fig. 14 is a cross sectional view of a magnetic sound record sheet mounted on a pair of setting pins of a panel when the distance between the pins is shortened by moving one of the pins; and

Fig. 15 is a cross sectional view of a magnetic sound record sheet mounted on a pair of setting pins of a panel when the distance between the pins is extended to stretch the sheet by moving one of the pins.

Now the invention will be explained with reference to the accompanying drawings.

In a magnetic sound record reading machine, it has been general practice to place a magnetic sound record sheet 4 on a panel 1 having a window W of a magnetic sound record reading machine, facing the magnetic sound record iilm of the magnetic sound record sheet downwardly, by engaging setting holes 3, 3', 3l", 3' of the sheet with the setting pins 2, 2', 2, 2 xed on the panel 1 as illustrated in Fig. 1. On the sheet thus set, a transparent pressing plate is placed to keep the sheet tightly in the position, and a turn table provided with sound recording and reproducing heads (a) (b) (c) on the circumference is arranged below the sheet 4 and the turn table is rotated and moved at the same time in the longitudinal direction to scan the sound tracks on the sheet with the sound recording and reproducing heads.

However, the sheet may elongate or shrink according to the change of temperature and humidity. If the sheet shrinks, the distances between the setting holes will be decreased while the distances between settings pins are maintained substantially constant. Under such conditions, it is impossible to effect the engagements of the holes and pins without breaking the magnetic sound record sheet.

On the other hand, when the magnetic sound record sheet is elongated, the distances between the setting holes will become greater than distances between the pins and when the sheet is set on the magnetic sound record reading machine, the sheet will be slackened and take a complicated form as illustrated in Fig. l. When a pressing plate is placed on such a sheet to press it, there will be wrinkles and lfurrows on the surface of the sheet and it is evident that it is impossible to obtain satisfactory recording or reproducing of sound with such a sheet.

. scanning'p According to the invention a setting `pin 2 is `iixed on the panel but another setting prin 2 4(see Fig. 2) is made movable along a guiding means 5 provided in alignment with the lineV connecting the pins 2 and 2' and is always pulled-Vinithe direction. ofzbya force of propenstrength. T l'ltethil'dsetting'pinfl' .s also Amovable along agidng 'means-5 provided in alignment .with a line .connecting vthepins '2 and Z" and pulledin thediagonaldirection of arrow 7 byproper force, whilethefourth .settingpin Y Y 2""is also movable along a guidingfslot 5 and is always Fig, 3 illustrates a sheet generally similar to Vthesheet Y andrcomprisingacarrieriand a magnetic sound record iilm 10 'between parallel demarcating linesX and Y, but having only two vsettingholes'lI, 511. vThe back surface'of the sheet' hasvisual descriptions such as letters, drawings and the ilike, `a space for descriptions. The setting Vholes 11, '171 "are 'formed .in the central line'Z betweenith'e'parallel dem'aracation"lines X artdY.V "The panel 1A on Vwhich the sheet is mountedjhas two setting pins,1(seef`f"ig. "4) fthe one '13 `iix'ed on the jpanel and the other :13' movable alonga guidingmeans'l'l provided Y intheposition coinciding with the 'central line Z' and always beingurged in-thedirec'tionof arrow 14.

whenethe-magnetic sound record sheet 4'or 4' is'placed by the .settingV means as illustrated kin Fig. 2 'or Fig. '4

` on thepanel 1VA or lv ofl a magnetic sound record reading machineA and pressed by a pressing plate from the top, and then sound recording and 'reproducing -heads Y() (10(6) *pro ded -on .the `circumference of a turn Y tablelatlequal-linear intervals as'the width L of the Amagnetic sound record fiilm offthe sheetIare brought in contact'with the'magneticfso'und recordflmonei'by oneby rotating the turn table in'the direction of arrow 15 at the sametimein .the longitudinal-'direction of 16 to-scan the soundtracks o'f `the sheet 4, `sound -recording or reproducing i can Vbe feected while the operator is reading or V#observing the Ydescription Von the front surf-ace of the sheet I through the transparent Vpressing'plate.

However, when the sheet .is elongated, for Vexample,

Y in fthe direction Vof V'the width bythe length `of Y(2)*as `shown VinFig'. y6, -thefcentral lineV Z.of the -she'etwill be removed to :z 4when one side 2.2"" ofthe -sheet'is Generallythe.lengthr'(l) is short, and the eect of the elongation isrnot so great as it will hin'derpractically the i recording orsreproducingof sound. Butsince thefcenter lineofthe turning :table '12 isrstill inthe line of Z, there will .he aslight ddiscrepancy between the sound track VPQ on the sheet and the scanning path PQ of the sound reproducing headon the turningtable 112. Accordingly `althoughrthe reproduction is the'beginningpart near P, wherethe discrepancy between the sound track andthe ath isinegligible issatisfactory, the reproduction inthe ending part Q, Q' will-he affected. substantially due to a relatively great .discrepancy Vbetween theV sound A trackrandthescannngxpath. Whenthe gap ofthe reproducing head is short, thisrdiculty is so serious -that theqheadis gradually moved Vaway `the 'central'part of 'the sound trackV Yto decrease :theintensity of sound sand atV last entirely driven fout .ofthe soundtrack tozinterruptVV the :reproduction Accordingly :satisfactory :reproduction of,.- sound;cannotlbe Yattained when the amount of Velongationissubstantial vMoreovenii the distance between ftheadjoining .trackslis'shor the reproducingheadntay bezremoved toitheneighhoung ,track .to causeonfusion oft-reproduction.

As to the elongation in the longitudinal direction, the adjustment of the position of the turn table is easy since when the head on the turn table is out of a sound track, it can be easily brought on asound track by moving manually the turn table or the sheet to place the head on the sound track and such au-adjustmentcan be'easily accomplished by a simple mechanism and operation. For ex- "ampleathefsheetcan be stretchedlongitudinally bynmeans cfdevices as` illustratedin Fig. 8, -9 and Vl0A which )will be Aexplained llater and Dthe starting lpoint Yof :the turn table in the longitudinal direction Vcan be vchanged easily by moving V'the turn '..table :by Ahand. The elongation in the longitudinal .direction may `be ,great when lthe sheet is considered aszaewhole, Afbuttthel longitudinal elongation in respect of eachfsoundtrackfis:negligiblegsince itfis intact the elongationlofthe width of asound track --which is very small. Y

However, the adjustment for the elongation mrlshrinkage in the direction of width is notsoeasy and tendsY to cause serious difficulties as explained abo-ve.

In -the setting according to the system of Fig. 4, the

'central linelZrothesheetaandlthe center ofthe turntable :are .always kept in Vthe -same .vertical plane Y and v.the elonvgationll) inlthe wi'dthLof the sheetis distributed on both sides ofathecentral lineZ to be `l/each onboth sides. Under `this icondition, .thethalfz-tracks yon both Vsides would Vbe substantially similar arc sections .of a circle to Yeach "other (strictly speaking, they are vsections of Vacycloid since Athe turn: table: moves :longitudinallyzwhile rotating) iand they .maygbe satisfactorily scanned'bytthe reproducing ,head :on `the;turnftahle since Vthe discrepancy between V.the soundtrack and lthe-scanrlingzpath:of `the reproducing -head is `relatively small, if any. When ;this setting system is used, it-isgpreferable as ,shown in Figs. v5(a) and and (b), to form the setting hole LH of the lsheet ina triangularfshape having substantially wider area than the cross ysection of thesetting pin N onfthey panel of the magnetic soundirecord readingmachine, section of the pin Nabeingalsomade aV triangular form corresponding tothe Vform of the angle pant l? of the holeH Vof the sheet. in iorder'to eliminateany chance-of breaking the angle part `17of the hole, itnis preferable togive some roundness to .thisipart and further tostrengthen the .part by 'affixed 'a reinforcement of aproper material such as paper, cloth, metallicoil,,resinioigthe like byfpasting, coating or any `other Vmeans.conventionally'used in .the fart Vfor such a purpose-f Y :According to the system as `illustrated in Fig. 4, -a magnetic .soundt-record sheet yis seton a panel yoyrneans of two pins 13, 13 and the v.distance between the two pinsis adjustable according to the change vof the length loffthesheet. Y Y Y :Forthis purpose Aone of -thepins 13 .is xed'on lthe panel and the other pin 1 3jis pulled outwardly along the center line, ofthe y,sheetrbya device as explainedlater and therefore thezsheet ,will 4.be stretchedin the'longitu- VvdinalY direction.Y It will be evident lthat if ithe ypinsv 13, .13' are .placed in the center Elineof the sheetand the movableppin 13' ismovable along'said center line, VWhile the turn table is moved alongthe same centerline, the Acenter'Vof'the'turntable is always in ltheline on aY-same 'verticalnplane ,including .the center line of Vthe sheet. =When the hole H ofthe-sheet and the section of the setting pin N are formedintheshape-as shown'inFirg. i5,(b,),.-and the y.sheet lisstretchedfn; :the V direction down- .wardly,-.the .center Z Aof thetsheetf is. maintained. always Y.in the Vv.samedinesince the needle'iismovableyonly ,ini .the center-linezwhich,.:isalsoztherdirectonrof the longitudinal movement of the iturnrtable. l

:Meurthe: mounting ordismounting-of the; sheet is ide- ;sired, ithersettngzpin :,Nisfmoved 2a .little fnrthefdirection rtoithecentermfzthesheet. I'herrtheengagementV between lthe setting pin NfthesettingholeHsof the -sheet will becomelooses'incethe Yfofwthe hole :is largerlhan gthe isectionalaarea-:ofithe pin, umd mountingoridismounting of the sheet can be carried out very easily with no risk of breaking the sheet. Now a device for moving a setting pin for the purpose or" stretching a magnetic sound record sheet on a panel of a magnetic sound record sheet reading machine will be explained.

Fig. 8 illustrates a stretching device for a magnetic sound record sheet which is operated manually. On a panel plate 1 is formed a guiding slot v14 which allows the sliding of a setting pin in the direction of central line Z of a magnetic sound record sheet. The setting pin N is liixed on a sliding member 19 slidable along dovetail grooves 1S, 18 formed in an attachment member fixed on the back surface of the panel plate 1 of a magnetic sound record reading machine.

The sliding member 19 is always pushed in the direction of arrow 20 by means of a spring 21 to stretch the sheet by the setting pin N -ixed on the sliding member 19. When it is desired to mount or dismount the sheet, the handle 22 is pushed in the opposite direction to arrow 20 against the force of the spring 21 to move .the setting pin N. Since the setting hole of the sheet is made suiiiciently larger than the sectional area of the setting pin N, the engagement between the hole and the pin will become loose when the pin is moved inwardly, and thus the sheet will be able to be removed from ythe pin easily with no fear of damaging the sheet.

The device for moving a setting pin illustrated in Fig. 9 is similar to that of Fig. 8. In the embodiment of Fig. 9, a setting pin N is :fixed on a sliding piece 23 Vwhich is slidable under 'the guidance of dovetail grooves 24, 24 and is pushed by a spring 25. The range of the movement of the sliding member is limited by a stopper 26.

Fig. illustrates a device slightly different from those of Figs. 8 and 9. A lever 27 pivoted at 28 is used as a member carrying a setting pin N in place of a sliding member. The lever 27 is pushed by a spring 29 to rotate around the pivot 28 thereby moving the setting pin N outwardly. The movement of the setting pin is not straight but in an arc. However, the movement of the needle may be considered straight for practical purpose since the amount of movement is relatively small in comparison with the length of the lever 27 which is made substantially long. By the devices as described above, the setting pins N can be moved inwardly and outwardly. When it is desired to mount or dismount the sheet, the needles may be moved to their inward positions by manual operations. However, such an operation is troublesome, and therefore it is desirable to attain such operations automatically. Accordingly, an apparatus as illustrated in Fig. 1l is provided in accordance with the invention which can operate to move a number of setting pins automatically at the same time. The apparatus of Fig. 11 is used in conjunction with the system as shown in Fig. 2.

In Fig. 1l, 1 represents a panel and 31 a pressing plate. On the back surface of the panel 1 a long metallic member 33 is slidably mounted along one side to be guided by guiding pins 34, 35 iixed on the panel 1, which guiding pins being in engagement with the slots of said metallic member. This metallic member 33 is always pulled in the direction of 37 by means of a spring 36. At one end of the metallic member 33 is pivoted at 39 a metallic link 38 which is pivoted on the panel lat 43 and extends along another side of the panel. On the other end of the link 38 is pivoted at 42 another long metallic'member 41 to extend along the side of the panel opposite to the rst metallic member 33. The metallic member 41 is guided by a pin 4-3 xed on the panel and is in engagement of a slotof the metallic member 41 and hence it is slidable. A button 32 is fixed on the first metallic member 33 wbichmay be moved in the direction opposite to the direction of arrow 37. When the member 33 is moved, the link 3S will be rotated around the pivot 43 to move the metallic member 41 in the direction 0f arrow 44. On the panel 1 are mounted devices for moving setting pins as explained with reference to Figs. 8, 9 or 10. The attachment members of these devices are ixed on the panel in proper positions near the corners of the panel and the setting pins are allowed to move inwardly and outwardly. In Fig. l1, 2, 2', 22" and 2" are setting pins (corresponding to N in Figs. 8, 9 and 10) while 48, 47 and 52 are sliding members supporting pins 2", 2' and 2 respectively (corresponding to 23 in Fig. 9). The setting pin 2 is a iixed pin and has no means for moving said pin. The long metallic member 33 has an inclined surface 45 adapted to engage with the sliding member 47 and another inclined surface 46 adapted to engage with the sliding member 48. When the metallic member 33 is moved in the direction opposite to 37, the sliding member 47 and 46 will be moved in the directions opposite to 8 and 7 respectively against springs urging the sliding members in the direction 8 or 7. When the sliding member is moved to a proper position, it is desirable to keep the sliding member in this position. For this purpose, a locking device comprising an elastic plate is provided. Since the locking device is similar for all the setting pins, the locking device will be explained only in respect of the pin 2. The elastic plate 49 is in slidable engagement with the lower surface of the sliding member 47, and when the sliding member is moved inwardly to reach a definite inward position, the end of the elastic plate comes into engagement with a groove of the sliding member 47 to lock said member together with the setting pin 2" xed thereon in said position. When the setting pin is brought in the inward position as described above, the long metallic member 33 is allowed to return to the original position by the action of the spring 36 by releasing the operation button 32. When the button 32 is released from the operation, the metallic member 33 is moved in the direction of arrow 37, but the inclined surfaces 45 of the metallic member does not act to move the sliding member 47 and `the sliding member is maintained in the locked position by the locking of the elastic member 49. It will be understood that the setting pin 2 can be moved by the inclined surface 46 of the metallic member 33 and is locked by the elastic member Si) when the metallic member 33 is operated as mentioned above, and further that the movable pin 2 can also be moved and locked in an inward position by means of a similar device on the side of the metallic member 41 and an elastic member 53 adapted to lock a sliding member 52 when the metallic member 41 is moved simultaneously according to the movement of the metallic member 33 through the link 3S. Now all the movable pins 2, 2" and 2 are fixed in their respective inward positions, and therefore it will be easy to mount a sheet by engaging the setting holes of the sheet with the setting pins of a magnetic sound record reading machine. In this condition, the sheet will be slackened to some extent. After mounting a sheet, a button 54 on the elastic plate 49 is pressed to release the sliding member 47 from the locking and the sliding member 47 is moved outwardly by the action of the spring 57 to stretch the sheet. Similarly the button 55 on the elastic member 59 for the pin 2" and the button 56 on the elastic member 53 for the pin 2 are pushed down to move the pins 2" and 2 outwardly to stretch the sheet. Of course, the stretch forces must not be too great lest the breaking of the sheet should occur, but the stretching forces can be easily adjusted by using proper springs in the devices for moving the pins. Now Ithe sheet is properly mounted on the panel in expanded condition, and the pressing plate 31 is `to be placed on the expanded sheet.

The pressing plate 31 is hinged on one' side A on the panel 1 and has locking means on the opposite side B. 'I'he locking means of the pressing plate comprises engagement pieces 73, 75 having a hole 72, 74 respectively.

78and79 andpressed-by a-platespring 77. The lock- Y Ving `member 91 has at Aends hooks 80 vand 88 adapted to 'engage 'withftheholes 72 and 74 of the-engagement Vpieces i73land -75 ofthe pressing plate 31. VTheengagementepieces 73 and 75'=are long enoughtopassithrough #holes provided in the 'panel land `also-inthe-metalllc V"member 33, Vandthe lockingbetween thepanel 1 4andthe Ypressing/plate V31 Aby the hooks `v80,81 as'described above is eiected belowithepanel and Vthe"meta1llicV member :33.

Now the metallic'member 33 is secured Yin a denite position bythe engagement vof the locking piece yof the pressing plate 31 passing through the -h vle providedn the metallicemerrrber 33 Aand thebutton 32 -is no longer operable. 'Thus Vthe sheet will be maintained ina denite position in stretched V'condition for recording or 'reproducing VLof Ylsofund.

When it is 'desired to Temovethe sheet'from the panel, irstly the locking Ymember v91is moved tothe left by vmeans Vof a Vbutton 83 inthe upper right corner ofthe panel to release the pressing 'plate 31 from the locking `by the hooks'80 and Y81-ar1d the pressing plate 31.

For this purpose, the lbutton -83 is movably mounted `on the panel Y1 and is urged upwardly by aspring. vOn the lower end' ofthe button 83 is provided a metallic piece vv84 having an inclined Vsurface '85 adapted Vto Vengage-with the inclined surface 87 atthe end of a metallic 1ever`86-p'ivoted at -89 on the panel 1, andhingedwith thelocking member '-91 lat 90. VWhen the Abutton 83 is pressed down, the lever 86 is rotated around-the pivot E89 land `the locking member 91 will be moved to Athe 'right to Yrelease'the pressing -plate 31 from the locking Vby the hooks V801and '81. After raising 'the pressing Vplate 31, Vthe button 32 now yis operated 'to move the metallic member 33 in thedirection opposite to, arrow v37 as `'explained before. 'Now the distances Ybetween'the vsetting pins 2, 222", 2"' are decreased and the engagement between the holes of the'sheet and the settingpins `are: Vloose, vand hence the removal of the sheet can be Velfectedeasily. In this operation, if there is provided a device-which Ylifts the sheet when the sheet'is brought into slackened condition `and is ready yfor disrnounting by moving the setting pins inwardly, itwill Ybe convenient. Accordingly, there are providedV on the Ipanel A1 of the magnetic sound recordreading machine lifting pieces 62, 63, V64 and 65. These pieces are of L Vshape and one arm of the piece -is placed onthe `level 'of the upper surface of the panel l1 while the'other arm is suspended downwardly. The llifting piece is Yrotatable around a pin provided in lthe Vpanel andthe mechanism for rotating the piece is almost similar in lrespect of all the four pieces, Yand therefore a detailed explanation will Vbe `made konly with reference to Ythe `lifting piece 65.

' The piece 65 is rotatable 'around a pin'6l (see Fig. l2)

provided lin vthepanel 1 and the suspended leg yof the piece isin engagement with the end of a lever 69 pivoted atV 71 on the -panel and hinged on 'the metallic member 33. `When the Ymetallicniember 33 is moved in the directionv opposite to the direction of arrow 37, the lever 69 is rotated around the pivot 71 and the horizontalof lthe vL shape will Vbe rotated -to `nise'since the leg of said Ylifting piece'is moved by the end of the lever69. It is tobefnoted that when-a sheet is mounted, the metallic member 33 is returned to the original Yposition by theaction of the spring 36 although :the setting 'pin 2".isin the inward position, and hencethe lifting piece is returned inthe horizontal Vposition notV to hinder the operation of Amounting'a sheet. 'It willbe needless to sayithat since ythe Ydirections of the movements ,of the metallic .members 33 and -41 are different rfrom each other, the position of the hinge Xing -the'lever on the vmetallic-member mustbe'varied in relationto the position'of the axis of'therotationof 'the'liftingpiece Y 1an apparatus as illustrated in Eig. -l1 is used,

the mounting and dismounting of a sheet can be easily effected since the change of the positions of afnumber Votsetting pins can -be automatieallyJa'nd simultaneously effected Aby the operation of a v`single',"button and Jthe sheet Lis vlifted automatically in disrnounting. Fig. 13 illustrates vanapparatuswhicheissimilarstoe'the apparatus lexplained with reference to 'Fig. l"1 but is adapted to -use for' -a vsystemV as illustrated 'inFig e4, :in other-words, an apparatus 'forlsetting V'a magnetic sound Vrecord sheet l'having Itwo vsetting holes Von fa 1panel having two Ysetting pins of a magnetic sound recording `machine.V In Vlthe drawing, a transparent pressing I plate 102^and aipranel 1010i a magneticzsound -recordrea'ding machine are :shown :by broken chain lines respectively. vThe pressingrplate 101 is hinged at 102', :10 "-on'thelpanel on one Avend and Yhas locking pieces 1104, 104 provided with rectangular holes 103, L'103' on *the opposite end. `When the pressing x'plate A102 is lowered onthepane'l, the-locking pieces'103, l'103' passthroughlthe holes 105 105 .provided in the panel "101 and are locked -by Vengagement between the holes 103, 103 lof -the vlocking pieces 104, '1104' and lthe hook Yends 108, 108 provided at ithe ends 'of'iloc/king members 106, 106'- which fare guided iby guides "109, 4-109 and 109', 109' respectively and always pushed in'the directions of 119 and '1'19 by springsll-IS and 11182respectively.

When it is desired to open the Vpressing plate 102, a metallicbar1210,Lwhich isgiided bystuds 111, 1-11"f1xed on the panel v101 through slots Y120', 121 provided ,in

the banlisrnovedlin'the direction of'arrow'122`by means of ajbntton -1l14,which projects throughthe :panel3101. Themetallic bar ,110fha'sinclined surfaces "123, V"123' -on the Vside and lpushes ythe -4locking members Y106, AV106' `in the directions opposite to the directions of 119,1119 against the springs 118, 118 when -it is moved as described above. -Thus the lockingsibetweenthelocking pieces 104, 104 and the locking members 106, 106' vare released and the pressing plate 102fmay Ybe raised.

*The movement Aofthe'metallic bar 4110 asftlescribedV above can be v'effected by simply Vxing theY button V114' on the bar Yand moving the button. However, it Will'be Yconvenientto vprovide ameans as illustrated inthe` drawing. lnthe'embodirnent ofthe drawing, ,the button i114 isconnected 'with alblock 112 by a rod 124 and is urged upwardly by aspiring-V113'. The block Y112 'has'.an in- 'clinedY surface '-116 vand a srnall roller 115 rotatably mounted'ronfsaidsurface. y

When,theibutton114 is'pnshed downwardly, namely'in the "direction of ,arrow 120, the roller 115 comes into contact nwith Aan inclined surface'11'7 Vof the metallic'bar 110 land pushes the metallic bar to slide in the direction o'farrow 122. k v v Now'thejapparatus for setting a magnetic sound record sheet ('S) VonV a panel of a magnetic soundrecord reading machine'will `be explained. The vpanel 1'01 is provided with two setting pins and 12.6 in the centrallongitu'- dinal line of the panel along VVwhich a turntable (not Y shown) moves vwhile rotating. A magneticV sound record sheet (S) has two setting'holes 138,138 inthe central longitudinal line and the holes are to be set on the setting pins "125, V126. 'Whenthe sheet is'to bezplace'd on the panel, it will be easier to have .the distance between the two settingpins '-125,126' shorterthan the distance between -the setting holes 138, '138,' asshown lin'Fig. 1J4. However, vunder Ysuch a condition, the 'sheet is ,slackened and nogood result can be attained in recording andY reproducing `of sound. AccordinglyV it will Vbe necessaryto expand the sheet in stretchedcondition as illustrated in Fig. '15. For thisgpurpose, one 'of the 'setting pins 125 is ,xed on lthe panel and fthe other settingv pin 126 Ais Vmounted slidably alongthe ,central longitudinal Eline of Vthe panel 101. e v v The setting holes of the sheet Sand the `section of the setting pin are made triangular'form as stated before with referenceto' Fig. 5. Since 'thesettingpinlzis Amov-V astoyes able, the sheet S can be always stretched irrespective of 'the amount of shrinkage or elongation of the sheet.

In the embodiment of Fig. 13, the movable setting pin 126 is fixed on a sliding member 140 which is guided by guides 127, 127 and pushed by a spring 128 in the direction of arrow 141, the direction being in accord with the longitudinal line of the panel 101 and the longitudinal line of the movement of the turn table of the magnetic sound record reading machine.

When it is desired to mount a sheet S on the panel 101, a knob 130 projecting from the surface of the panel 101 is pulled in the direction of arrow 142 to move a metallic number 129 connected with the knob 130 under guidance of guiding studs 131, 132 fixed on the panel and in engagement with the slots 137, 143 of the metallic member 129. (The metallic member 129 is always pulled in the direction opposite to the direction of arrow 142 by a spring 134 one end of which is fixed on a stud 133 on the panel 101.)

An inclined surface 145 of a piece 144 integral with the metallic member 129 pushes the sliding member 140 on which the pin 126 is fixed in the direction opposite to arrow 141. When the sliding member 140 proceeds, the

end 149 of a locking member 148 which is an elastic metallic piece tending to rise upwardly at one end comes into engagement with a lockingV device 140 provided on the front surface of the sliding member and the sliding member 140 is xed in a determined position which locates the setting pin 126 in the position as illustrated in Fig. 14 by 126. In the drawing, 147 is a clamping element which xes the elastic locking member 148 on the panel 101. Now the preparation for mounting a sheet S is made and the knob 130 is released. The metallic member 129 is returned to the original position by the action of the spring 134, but the pin 126 is maintained in the shifted position since the sliding member 140 is locked by the end 149 of the elastic locking member 148.

After placing a sheet as shown in Fig. 14, a button 150 projecting above the panel is pushed downwardly, namely in the direction opposite to the direction of arrow 151 to disengage the end 149 of the elastic locking member 148 from the engagement with a locking device 140' on the sliding member 140 to release the sliding member.

When emancipated from the locking, the sliding member 140 is moved in the direction opposite to the direction of arrow 141 under the action of the spring 128 together with the pin 126 xed on the sliding member 140.

Thus the sheet S is stretched on the panel 101. The position of the setting pin 126 may be diierent according to the amount of shrinkage or elongation of the sheet, but the sheet S will always be stretched on thepanel 101 in optimum condition. Now the pressing plate 102 will be lowered and the pressing plate 102 isV locked with the panel 101 as already explained.

When it is desired to dismount the sheet S from the panel 101, the pressing plate 102 is unlocked by the operation of the button 114 as already explained and the pressing plate 102 is raised. Then the metallic member 129 is moved by pulling the knob in the direction of arrow 142. The setting pin 126 will be moved in the direction opposite to the direction of arrow 142 to place the setting pin in a definite position as shown in Fig. 14 by the mechanism as already explained.

In this position dismounting of the sheet for the setting pins can be carried out easily. According Ito this invention, a device for automatically dismounting the sheetvS from lthe setting pins is further provided to facilitate the dismounting operation. According to the embodiment of Fig. 13, a lifting lever 153 is provided on the panel 101 and is arranged to be rotated around a hinge 152 provided in the surface of :the panel when `the metallic member 129 is pulled in the direction opposite to the direction of arrow 142 by a projection 146 of the metallic piece 144 which moves together with themetallic merita ber 129 and comes into engagement with Ithe leg 154 of the lever 153 to raise the end of the lever 153 above the level of the setting pin 126 to disengage the sheet S from the setting pin 126. On one end of the metallic member 129 is pivoted at 157 one end of a link 158 which is pivoted at 156 on the panel 101 and has another end hinged at 160 with the end of another metallic member 159. When the knob 130 is moved in the direction of arrow 142 the link 158 is rotated around the pivot 156 and the metallic member 159 is moved inthe direction of arrow 161 under the guidance of a stud 163 which is in engagement with a slot provided in the metallic member 159. A metallic piece 162 is fixed on the metallic member 159 and comes into contact with the leg 168 of a lifting lever 165 hinged on the panel by a pin 166 to push the leg 168. Accordingly the end of the lever 165 is raised in the direction of arrow 169 and the sheet is dismounted from the setting pin 125. It is preferable to provide springs 171 and 172 for maintaining the lifting levers I153 and 165 to keep always the levers on the surface of the panel in horizontal condition unless they are rotated by the projection 146 movable together with the metallic member 129 and lthe metallic piece 162 iixed on the metallic member 159.

It will be clear from the above descriptions that the preparation of mounting the sheet can be eiected by pulling a knob 130 in the direction of arrow 142 until the sliding member is locked by `the engagement with the end 149 of the elastic member 148 and releasing the knob 130.

-In this operation, the lifting levers 153, 165 are raised once but are returned to the original position since the metallic members 129 and 159 are returned to the original position when the knob 130 is released.

After engaging the setting holes of lthe sheet on the setting pins 125 and 126, the button 150 is pressed downwardly to release .the locking of the sliding member 140 from the engagement of the elastic locking member 148, and then the button is released. The pin 126 is moved in the direction of arrow 141 to stretch the sheet.

For dismounting ,the sheet, the knob 130 is pulled in the direction of arrow 130 to move the setting pin 126 in the direction opposite to the direction of arrow 141, namely in the position of 126 in Fig. 14. During Vthis operation, the lifting levers 153, are raised to dismount the sheet from the engagement of setting pins 125, V126.

This operation brings the setting pin 126 in the position as shown in Fig. 14, and therefore the apparatus is ready for receiving a new sheet to be operated.

As stated already, when the pressing plate 102 is lowered, `the locking piece 103, 103 of the pressing plate 102 pass through the holes 105, 105' of the panel 101. It is arranged in a preferred embodiment to have at least one of'the locking pieces 103, 103, for example 103, pass through a slot 136 provided in the metallic member 129 as well. If, after lowering the pressing plate 102 on a sheet, the knob 130 is operated, it may cause breaking of setting holes of the sheet, but when the metallic member is in engagement with the locking piece of the pressing plate 102, there will be no chance of the knob being operated after placing ythe pressing plate 102 on the sheet.

While the invention is explained with reference to some preferred embodiments of the invention, it will be apparent to those experienced in the art that it is possible to make various modications and alterations within the spirit and the scope of this invention, and therefore it isto be understood that this invention is not limited to I'those illustrated in the drawings and explained in the above and limited only by claims.

What is claimed is:

l. A setting system for setting a magnetic sound record sheet, having a description on a iront surface and a magnetic sound record flm on a lback fsurface, in `aV mag-V neticrsound recording and reading -machine, -said `system sound :record Sheet being-mounted atly against the panel plate'with thelnlagnetic sound record lm downward to expose Athe Vfilm through Vsaid window, the -panel plate Vhaving :a longitudinal center lineg a turni-tablebelowi-the panel zplate :and dening -an axis -of rotation,=means 4v-for shifting the turn table along the longitudinal centerlline of the panel yplate and ladjacent the window, a plurality f comprising a panel Lplatedefining a windowythe magnetic Y sheet,rirstwmeans for normallyurging'rthe'movable `'pin Vaway Yfrom --the xed pin to stretch the sheet, second means'for movingthe movable pintowards the fixed pin to a mounting and dismounting position -to vfacilitate mounting yand dismounting of the sheet, means for xing the nmovable pin yin the latter said positionyand a transparent pressing-plate Yto press'the extended sheet against the'fplaterand to allow observation of said description.

2. A setting'system according to claim 1,Wherein the V'two setting pins 'are on thepanel plate along the longitudinal center line of the latter and wherein the movable pin is normally .urged along-'the longitudinal center line Oftherpanel plate, said rstzmeansincluding a -springaenstretch the sheet and permitting the'movble-pin-to -be moved towardfthe xed-pin for mounting and dismounting the'sheet.

"3. -A setting system'accordirrgftoV claim l1, comprising a'pluralityfofY movable pinson'thepanel yplate of la-magneticaound record'readingmahine,said second means including -a 'link Ysystem comprising y"elements -operatively associated with'the movable pins fror'moving thesame 4. A setting `system according to claim vlfwhereinethe means for xing lthe movable -pincomprises a ysliding member on which said pin is. fixed and an elastic member xed on the panel plate and adapted to Vengage the sliding member, with said sliding member moved to bring the pin 4xed thereon'to a predetermined position. 5. A setting* system according -to .claim 1, further comprising a device for facilitating' dismounting of -a sheet from the panel plate, said ydevice comprising fL- shaped elements rotatably -hinged'by each ofthe setting pins and each having an upright leg suspended down- Wardly from the panel plate and a bottom horizontal arm at 4the -level ,of the panel plate, -andanelement Vforfengaging the leg to vpivot --therhorizontal arm 'totraise -the sheet when the movable pin is movedrtoward'the fixed k12 gaging theV movable pin to K References Cited inthe file of this patent FOREIGN PATENTS 745,218 Great Britain Feb. 22, 1956 

